In the anime she is the operator of NeedleMan.EXE.
She is a member of Nebula in Axess and partners with Dr. Regal. She uses NeedleMan.EXE to cause trouble and can disguise herself as Ms. Mari easily, the only difference being the lipstick and hair bun (Ms. Mari shapes her hair like a cinnamon bun; Ms. Yuri's hair is more croissant shaped). She is portrayed as a mysterious character, whose past is unknown and appears in the sidelines, rarely getting directly involved, but often the secondary mastermind to everything, directly below Regal.
She is revealed to be Ms. Mari's sister, but is supposedly dead. Her past is explored in an episode involving Misaki, a NetPolice Detective that she tricked. She was on a plane trip fifteen years prior to Stream along with a young Regal, returning from Europe. The plane had an accident, though, and everyone aboard died. Duo happened to be passing by Earth at that moment, and decided to pick two test subjects to turn them into Probes to survey humanity and the evolution of the Network system. She survived though (at Duo's request) and gained new powers, such as quick recovery from physical injuries that otherwise would prove fatal and high Synchro Ratings, and immunity to the Dark Chips corruption.
Towards the end of Axess, after she recovers from colliding with a moving van, she starts remembering her past. Regal then orders Ms. Yuri to kill Ms. Mari and gives her a Dark Synchro Chip. But she refuses and in the ensuing battle she is thrown into the sea with Misaki, courtesy of ProtoMan, who was still under Dark Chip's influence.
She resurfaced in Episode 21 of Stream, 'Dr. Wily's Daughter'. It is revealed that she brought Misaki to the hospital and then fled. She mets with her foster father, Dr. Wily, and is given a Synchro Chip. During the rest of Stream, she pops out from time to time to assist the people chosen by Duo. She also reunites with her sister Ms. Mari after being separated from many years.
Ms. Yuri's role is greatly reduced in the ensuing seasons of Beast and Beast+. She is last seen in Episode 26 of Beast+ along with Ms. Mari and Tamako in a hot spring resort.
|Dr. Regal (all games, anime, and manga) and LaserMan.EXE (all games and anime) • CosmoMan.EXE (manga)|
|Mega Man Battle Network 4||ShadeMan.EXE • HealNavis|
|Mega Man Battle Network 5||BlizzardMan.EXE • ShadeMan.EXE • CloudMan.EXE • Dark MegaMan.EXE • CosmoMan.EXE • Dark Colonel.EXE (Team Colonel) • Dark ProtoMan.EXE (Team Protoman) • Nebula Grey • Lackeys and HealNavis|
|MegaMan NT Warrior Axess||Ms. Yuri and NeedleMan.EXE • Dark Miyabi and ShadowMan.EXE • Anetta • Dark ProtoMan.EXE • BurnerMan.EXE • SparkMan.EXE • GravityMan.EXE • BrightMan.EXE • SwordMan.EXE • ColdMan.EXE • StarMan.EXE • FlashMan.EXE • BeastMan.EXE • DesertMan.EXE • PlantMan.EXE • VideoMan.EXE • BowlMan.EXE|
|Rockman EXE Stream||Nebula Grey • Dark MegaMan.EXE • CosmoMan.EXE • LarkMan.EXE • CloudMan.EXE • BlizzardMan.EXE|
|MegaMan NT Warrior (manga)||CloudMan.EXE • Nebula Grey • Darkloids|